Auditors are experts in accounting and auditing matters, but they are not reasonably expected to be experts in any other field. Therefore, in performing the audit works the auditor needs the assistance from an expert to assist the auditor in obtaining sufficient appropriate audit evidence.
The auditor has sole responsibility for the audit opinion expressed, and that responsibility is not reduced by the auditor’s use of the work of an auditor’s expert. Nonetheless, if the auditor using the work of an auditor’s expert, having followed this ISA, concludes that the work of that expert is adequate for the auditor’s purposes, the auditor may accept that expert’s findings or conclusions in the expert’s field as appropriate audit evidence
So, who meets these standards.
Auditor’s expert is an individual or organization possessing expertise in a field other than accounting or auditing, whose work in that field is used by the auditor to assist the auditor in obtaining sufficient appropriate audit evidence. An auditor’s expert may be either an auditor’s internal expert (who is a partner or staff, including temporary staff, of the auditor’s firm or a network firm), or an auditor’s external expert.
Expertise in a field other than accounting or auditing may include expertise in relation to such matters as:
In some cases, however, particularly those involving an emerging area of accounting or auditing expertise, distinguishing between specialized areas of accounting or auditing, and expertise in another field, will be a matter of professional judgment. Applicable professional rules and standards regarding education and competency requirements for accountants and auditors may assist the auditor in exercising that judgment (HRD).